Walkie Talkie

Hello
I was just wondering, if I could make a pair of walkie talkies of my microbits. I have succeeded making a wired communication system with 2 microphone and 2 speakers. I but I dont know to do it with radio using microbits.

Version 2 Microbits ?

No I think the first gen. I have two speakers to pin 0 and two microphoneboards to pin 1